Controller for electric motors for sewing-machines.



F. P. HUYGK. GONTROLLEB FOB ELECTRIC MOTORS FOB SEWING MACHINES.

APPLIOATION IILEDDEU. 2811907. *Patented Feb. 28,

2 SEBBTS-SHEET 1.

f 'F.y. HUYGK. v l CONTROLLER FOR ELECTRIC MOT "APPLIOATION- 985.758. Y

ORS'FOB SEWING MACHINES.` FILED DBO 2B, 1907 Patented Feb.

. 2 SEEE .n 1HE Y WLTNESSES- Motors for Sewing-Machines;

renners r. Huron, or

TOLEDO, OHIO, ASSIGNOR TO EDWARD H. RHOADES, JB.,

TRUSTEE, OF TOLEDO, OHIO,

CONTROLLER FOR ELECTRIC MOTORS FOR SEWING-MACHINES.

985,758. origini-.t1 appncationsiee June 7, 19o?,

Specification of Letters Patent.

Serial No. 377,710.

lxatelltcd Feb. 2S, 1911.

Divided and this application tiled December 28,

1907. Serial No. 408,338.

To all 'whom 'it may concern:

Be it known that I, FRANCIS P. Huron, a citizen of the United States, residin at Toledo, in the county'of Lucas and tta-te of Ohio, have invented certain new and useful Improvements in Controllers for Electric and I do declare .the following to be a full, clear, and exact descriptionv of the invention, such as will enable others skilled in the art to which Iit appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to electric motors for sewing machines, and its object is to furnish i 1n connection with a' motor, mounted directly upon designed to be and operatively connected with the shaft of a .sewing machine, a controlling device consisting of a rheostat and a brake assembled with the motor as a compact unitary structure adapted, as above stated, to be connected 4directly with the shaft of a sewing machine, thus dispensing with theV controlling devices heretofore in use in which the rheostat is an independent mechanism secured separately, beneath the sewing machine table.

The struct-ure here indicated is intended to occupy such small space that it may be employed with any drop-head sewing machine in common use, and folded with the machine into its receptacle without necessitating the removal of the motoras has been necessary rwith sewing machine motors heretofore in use. 4

A furtherobject of my invention -is to provide a stopping and starting and braking mechanism in which a single movement releases the brake and startsthe motor', and in which the reverse movement, by which thel 'brake is applied and the current is cnt off, is

attained automatically. Y

I attain these objects by means of the devices and' construction hereinafter described, 'and shown and illustrated'in the accompanying drawings in' whic n Figure 1 is a central vertical sectional elevation' of my controller moiln'ted in operative relation to its motor and to a sewing machine; Fig. 2 a. front elevation of the same with the front cover ofv the rhcostat Astantiall removed., and Fig. 3 a rear elevation of the same. 1

Like numerals represent like parts throughout the drawings.

In my application for a patent for sewing machine electric motors, filed June 7, 1907, Serial-Number 377,710, of which this application is a division, I have shown and described an electric sewing machine motor comprising a rotary member and a stationary member concentrically mounted in subl the same plane with a supporting frame or housing,` the rotary member being operatively connected with a sewing machine shaft, the' frame and the stationary member being revoluble about the sewing machine shaft but being provided .with table-rests which preventthcir rotation. These parts being there sufficiently described there will be given here only such motor and its associated parts as will give a proper understanding of my controlling devices.

In the drawings, 'l is shaft to the projecting a sewing machine yend of which 1s attached, in vthe place usually occupied by the hand-`wheel or balance-wheel of the ma chine, the rotary member 2 of an electric motor. y

'3 is aY frame or housing which support-s the stationary member 4 of the motor concentrically with the part 2, the frame beingV adapted and arranged to rotate about the shaft of the sewing Amachine independently of the rotor.v

To preventsuch rotation of the frame and to hold 't and its burden stationary, two

arms 5 are provided, the upper ends of these arms being soclreted in the frame and being y pressed normally .downward by springs 6.

\ See Fig. 3.) The lower ends of the arms 5 -description of the the weight of the At their within the y stat 7, consisting of a hollow spooll 8 of dishlike forni, of porcelain or other non-conduct-- ing substance, about the periphery of which spool is wound :L eeries ot resistance coils 9,

'..connected respectively wi th contact-pins 1.0, the electric resistance decreaenig through the Series oi' contact-pins 'from right to left or' clockivise. (See Fig. 2.) Centrally of the .spool is a stud 11 upon which is journaled a barrel 12 .containing'a coiled spring 13, one end of which is connected With the barrel the other end beingJ connected with the barrelarbor. Projecting radially-frein the barrel is' a lug 14,1(see Fig. 2,) to which is secured rigidly one end of a curved contact-spring .l-,the other end being adapted and ar- 1 ranged to engage successively the resistance contact-p1ns 10.l The .spring 13 holds the.

contact-spring;` 15 retracted .and normally ,against idler-pin 10a :ind out of circuit.'

' 16 1s a disk having a grooved 'periphery' secured centrallyto and revolving With the barrel 12. This disk forms both apu-lley for' rotating the barrel and a. cover for the v cavity ofthe spool 8 and itssupporting ring 13a.. [n the peripheral groove of the pulley il'vissecured one end of a tleXible hand 17, ,partly embracing the pulley and which leads and .is secured to and is controlled .by the trea'dle of the sewing machine or other suitableldevicefor. controlling the band 17 `and itsI pulley 16.: It Will be--seen that'when the, band is drawn downwardly and un- -jvvound from.I the pulley, the pulley is rotated, carrying with it the barrel and `the 1contactfspring, and that the'contact-spring iis thus oiiickly" and securely vmoved into contactwith -either of theresistancepins 10 as mav be desired. 1 I Projectingr :from the face of the barrel 12jis an insulated vcrank-pin 18, (see Fig.

2Q which is enoaged hy a 'stirrup 19 which i'sconn'ected Wit two metal bands orfbraker-ofds'.v .20 leading to and connected with the loLWt'er ends of brake-shoes 21 through suitehle aperturesV formed in the stationary 'memberpf the motor. The brake-shoes are flexible sheet-metal and are secured at ltheir upper ends, as at 21?, to the inner side of thesftationzirymagnet as shown. The brakeshoes 'are faced with leather or` other lsuitable rnaterial. -Th.`e' metal of the brakeshoes'is resilient and forms springs Which tend to hold the 'brake-shoes normally out of Contact With. the periphery of the rota-ry ineit-iber of the motor. Theronnection be- AtWeen the stirrup 19 and thev bra'lffe-rods 20 is through a turn-buckle 22 which furnishes means for adjusting' the tension between the I A It will `b'e"'sf een thatwhen the pulley and-barrel 'are rotated to v,Inovethe contact-spring 15 into .Contact with the various resistance-pins 10,

the -movement of the barrel, at the same time, releases'tlie'tension upon the brake- 4shoe springs in advance 'of the Contact' springs' touching the first spring in the Series, permitting therotor .to revolve-freely,

operating variable resistance and brake'- mechanism here described the speed and movement .of themachine may' beexactly cont-rolled.' i

The course; of. the lelectric ct'iirrent is,

through irl-leading Wire 23 throughlink- Q/i to' and through the appropriate windings` brushes Vand commutator of .thel motor,

thence through the linl 2510 the Contact" pin of lowest .resistancein the series-oi pins 10 in the rh'eostat," thence-through the selected windings. of the rhcostat, through the 'contact-spring' 15 and the arbor 11" through' a link, net shon'n, tothe outleadiiig wire 2G,

Froin'the foregoing"description of nii-"device tlie assein'bling and operation of the same will .be fully understood without. itin'- ther explanation. l i

Having described invento-11;* i

'v claim and desire to secureby Lettere Pat- `ent `is,-

1. In a .device ot 'the described character,

.an electric motor the rotor of.ii'lii 2h is adapted for operative connection with aseivingmachine shaft,..a rheost-at, a brake mechanism for the rotor, a housing Which supioo ports said motor iheostat and biakeinech- I anisni in operative relation as a unitary .striictiiie,'means torinanually actuating' the rheostat and brake mechanism in harmony, and means for detachahlyand 'revoluhly mounting' the housing4 upon such shaft.

2. In a device of the described. character, an electric motor, a spring-controlled brake normally'set, a normally open spring-controlled rheostat` connections .between the iio brake and rheoetat for releasing the 'brake in advance of theclo'si'ngof :the circuit.

through the rheostat and for openingsi'ich circuit in advance of the setting ofthe hiiake,

and, a. housing adapted for connection With a. sewing machine shaft and which supports the motoi` and rheostat in operative relation,

3. In a device'of' the described character,

lan electric motor, a spring-controlled brake normally set, a normally open springt-com trolled rheostat, connections between the brake.

and rheostat for releasing the brakein advance of the closing of the circuit through the rheostat and for opening such circuit. ined-- vence of the sett-ingr ofthe hralt'e', a' housing"4 adapted for connection with a sewing ma-r- -chineshaft and'ivhieh supports themotQ and rheostat in operativevrelation, and meallbf ing the circuit.

`iiormannally releasing-the brake end .c'los coils disposed incuiiifilinear relation, a con?` @tact-piece journaled in the rheostat Vand' adapted to close a 'circuit-through said coils in succession, a s ring which holds the con` tact-piece normal y in openlcircuit position; a normally set spring-controlled brake for the motor; means for actuating'the contact-l piece and the bralrev in harmonyand a house ing adapted for engagement with the shaft of 4a sewing machine and which supports in operative relation the stationary member of the motor fandl the rheostat.

5. AIn a device of the described character, an

electric motoradapted for operative engagement with asewing machine shaft, a brakev interposed 'between the rotary andv stationary members of the `motor and' adapted to directly engage in frictional contact such rotary member, y actuating thebrake andtherheostat in har` mony with each othen Y A l 6. The co binationy with an electric me .-"tor, of va `rlieostat comprising a hollow spool,

a resistancel conductor wound peripherally about said spool, a rotaryV switch within the hollowspool controlling said resist-ance, a rotary member for-actuating said switch, a'v brake'` for said motor, and a connection between said rotary member and brake whereby said brake and switch are operated in cooperation. .Y '7

j The combination withan electric motor, of a rheostat tliereforfcomprising a hollow spool inthe planey and at one side of said motor, a resistance conductorv wound about saidspool, a switch within saidspool controlling said resistance, a rotary member for actuatingfsaid switch 'a brake for said motor and a lconnection between said brake yand said rotaiymeniber within the spool.

8,` The combination'with an .electric motor, of controlling' rlieostattherefor com* prising a hollow spool, a resistance conductor wound about said spool, a bralie for'vsaid l motor, and mechanismrwithinfsaid hollow spool for controllingsaid resistance and actuating the brake.

9. The combination with an electric motor, of a controlling rheostattherefor com'- prising a hollowspooha resistance conduc-i tor wound about said spool, a switch for controlling said resistance within said spool,

-a rotary member also witlii'n'sa'id spooly for operating said switch, a brake for said mosaid brake and said 4rotary member` within `said spool, a spring within said spool for actuating said rotary member, in one direction and a revo-` luble coverfor said spoolfor actuating said QIQVBBFS, l'

v 4." In a device of the described chai-aeter, an electricmotor adapted for operative ,con-j y.nection with a sewing machine shaft; a rlieostat `comprising 1.a series of resistance a .rheostat and means for,`

rotary member "against the tension o said spring. l

10. .The combination with an electric ino'- `tor,'o'f a controlling rheostat for said lmotor arranged adjacent thereto and comprising a hollow spool, ai'esistanee conductor wound about said spool, a switch within said spool,

airotary memberwithin said yspool for actuating saidswitch, brake strapsV for peripherally` engaging the rotor ofy said motor on opposite sides thereofand 'having' .converg-v ing Vaeniating connections `extending into' said hollow'spool, a' crank pin on said rotaI'V member within said spool and" a stirrup exif' gaging-saidcranl; pin and connected to said j brake operating connections.

i 11,-The combination with an electri'cmotor comprising a rotor and a stator concentrically arrangedtlie one about the' other, of a switch eccentrically arranged and mechanically connected' to said stator, a brake arranged intermediate said rotor and stator, 'and a common actuating connection for said bra-ke and said switch.

12;'Tlie combination ywith an electricmotor comprising a rotor and a stator concentrically arranged the one about the"other,of

an eccentrically'.arranged switch, a brake for engaging the periphery of said rotor, a connection between said brake and switch, and

`'actuating means forsaid switch.

13. The combination with an electricmotor,l of a controlling switch and mechanical vbrake therefor, `a rotary member for successively operating said switch and brake, a i

flexible connection for rotating said member inv one d irectionand automatic means for rotating said member in the opposite direction. Y

14. The combination with an electric niotor, Vof a rotary controlling switch and mechanical brake therefor, a housing for said. switch, brake operating mechanism'also inica closed in `said housing forming tlie actnating member for said switch and brake qperating mechanism.

. 15. The combination with an electric motor, of a rotary controlling switch and a mechanical, brake therefor, a housing for said s witel'i` secured to the stator of the nio tor,r brake actuating mechanism also 'inclosed in said housing, and a rotary closure for said housing forming an actuating inember for `said Vswitch and brake operating mechanism. I

16. The combination'with an electric nio tor, of an annular housing secured to the stator of"` said motor, a brake for saidmotor arranged between the rotor and stator tlierey, of, a rotary controlling switch for said motor within said annular housing, an actuating device for said brake also within said housing" andk a connection between said actuating device and brake passing through a recess lin the stator.

17. The combination lwith an electricmo tor, of a rotary controlling switch, and ai` mechanical brake therefor, @housing inai'spring witlinsaid 'hoilsingjoi' actuating' 1 'closing said switch, brake operating mechasaid mechanism inV theoppositedirection. 10

"Unisnir 'also inclosed within sadlhousing, a In testimo'n Wlieeof I-aix )ny signature .rotary closure for sind housing formlng 2mq m presence ,o .two Wltnesses.

actuating member for said switch and brake FRANCIS P.: f operating-n1echanism, @flexible connection j Witnesses;V u 4 Surrounding the peripheryof said closure CLAYTONMURPHY,'

Afor actuating -the sume in one direction and 'WM.,'HANSE N. 

